对地球轨道偏心率亚轨道尺度和准410ka周期特征解析：基于行星会合向量指数对偏心率周期机理的新认知

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Abstract： The planetarysynodic vector index K can represent the motion characteristics of the sun relative to the masscenter of the solar system. The maximum distance of the masscenter of the sun from the masscenter of the solar system has exceeded the actual diameter of the sun，indicating that the masscenter of the solar system is no longer within the sun itself.The variation in the sun’s distance to the solar system’s mass center，relative to the planetary motion orbits， is the variation in the position of the sun’s focus. The K vector index indirectly indicates that the sun’s orbital motion has a sub-orbital scale quasi-24ooa characteristic period and significant orbital scale quasi- .100ka and quasi- cycles. It has found that the sun's focus exhibits millennial-scale 180∘ reversals alongthe eliptical orbitalarc.Thissuggests thatthevariation inearth'sorbitaleccentricity isnot solelydue to the perturbation of the planetary system but should also consider the contribution of the planetary system's balancing and regulatory effects on the sun’s orbital motion. Additionally，it has been discovered that the quasi- .410ka period of earth's orbital eccentricity serves as a geological timing“pendulum” with quasi-directional constancy.

This new concept may provide new insights and theoretical exploration pathways for discussing the causes of climate change at orbital and sub-orbital scales.

Key words： masscenter of the solar system; planetary synodic vector index; earth's orbital eccentricity; quasi1074 a cycle; quasi-2400 a cycle; quasi- .410ka cycle

刘复刚和王建（2013）、刘复刚等（2023）分别创建了行星会合指数 K 和行星会合向量指数 K ，后者如式（1）所示。（剩余8584字）